Re: [syzbot] [audit?] [bpf?] INFO: rcu detected stall in kauditd_thread (4)

From: Hillf Danton
Date: Thu Mar 28 2024 - 19:28:39 EST


On Wed, 27 Mar 2024 11:39:42 -0700
> syzbot found the following issue on:
>
> HEAD commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel..
> git tree: upstream
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=112840ee180000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

--- x/net/sched/sch_taprio.c
+++ y/net/sched/sch_taprio.c
@@ -980,7 +980,7 @@ first_run:
rcu_assign_pointer(q->current_entry, next);
spin_unlock(&q->current_entry_lock);

- hrtimer_set_expires(&q->advance_timer, end_time);
+ hrtimer_forward_now(&q->advance_timer, ns_to_ktime(NSEC_PER_USEC *200));

rcu_read_lock();
__netif_schedule(sch);
--